Some adventures were quiet - as when he found a lovely book about bears to read. And some adventures were loud - as when he discovered the trumpet.
上面两个句子如果没有破折号和as,改写后的句子比较好理解:Some adventures were quiet when he found a lovely book about bears to read. And some adventures were loud when he discovered the trumpet.
但原文增加了破折号和词汇as。
请问:怎样分析和理解as在绘本句子中的用法。
谢谢老师!